This is all very good advice, as your skin and mucous membranes in the mouth, nose and other areas are the first line of defense.

However, if an intruder is introduced, it is up to the body's immune system to eradicate it. But for many folks it is hard to add in 5 servings of vegetables a day as recommended. You could go to your family doctor, but he really was trained to treat the illness. You could take lots of supplements, but still may not have a healthy immune system.

If you follow the advice of the Center for Disease Control, World Health Organization, and Homeland Security, you would berke your hands often, cover your mouth when you cough and stay at home when you are sick. Instead of the Standard American Diet that consists of 80% acid and 20% alkaline food, eat a diet of 20% acid and 80% alkaline. Vegetables and fruits are basically alkaline while meats, dairy, and processed foods are acid.

Our immune system is an amazing and complex system, it fends off foreign bacteria and viruses which cause infections or illnesses. So how do you build up your immune system.

Can Your Immune System Help Fight the Swine Flu.